Sealing cap of an atomizer

ABSTRACT

A sealing cap including a metal cap shell and a sealing rubber fitted into the metal cap shell and mounted around the downward plunger of the press head of an atomizer, wherein the metal cap shell includes a flat annular base having an inner diameter and an outer diameter, a downward flange extending downwardly from the outer diameter of the flat annular base of the metal cap shell, a barrel raised from an inner diameter of the flat annular base of the metal cap shell and having an inward flange around a top opening thereof. The sealing rubber comprises a flat annular base fitted into the downward flange of the metal cap shell and attached to the flat annular base of the metal cap shell on the inside, a hollow cylindrical head raised from the flat annular base of the sealing rubber and fitted into the barrel of the metal cover shell, an annular coupling portion inwardly extending from the connecting area between the flat annular base and hollow cylindrical head of the sealing rubber, and a downward annular flange at the center of the topmost edge of the hollow cylindrical head for tightly engaging periphery of the bottom plunger of the atomizer press head.

BACKGROUND OF THE INVENTION

The present invention relates to atomizers, and relates moreparticularly to a sealing cap covered on the neck of the container of anatomizer to prevent a leakage.

Various atomizers have been developed and used for different purposes,for example, for spraying paint, insecticide, perfume, etc. FIG. 1 showsa conventional atomizer which is comprised of a container H which holdsa liquid, a metal covering D covered on the neck of the container H, acap B and a gasket C fastened to the metal covering D, a press head 1having a bottom plunger A inserted through the cap B and the gasket C, acylinder E connected to the cap B and suspended inside the container H,a dip tube J connected to the bottom end of the cylinder E for inducingliquid from the container H into the cylinder E, a piston F connected tothe plunger A of the press head 1 and moved by it in the accumulationchamber defined within the cylinder E, and a compression spring Gmounted inside the cylinder E to give an upward force to the piston F.Referring to FIG. 2, when the press head 1 is depressed, the piston A ismoved downwardly to force the liquid from the cylinder E out of thepress head 1. When the press head 1 is released, liquid is induced fromthe container H into the cylinder E through the dip tube J. Thisstructure of atomizer is still not satisfactory in function. When thepress head 1 is depressed, liquid tends to be forced out of the cap Bthrough the gap K between the cap B and the plunger A. When a leakageoccurs, liquid cannot be efficiently forced out of the nozzle of thepress head 1. Furthermore, because the cap B and the cylinder E arerespectively molded from rigid plastic, it is difficult to force thecylinder E into engagement with the cap B.

SUMMARY OF THE INVENTION

The present invention provides a sealing cap for atomizers whicheliminates the aforesaid drawbacks. It is therefore one object of thepresent invention to provide a sealing cap which effectively seals theatomizer. It is another object of the present invention to provide asealing cap which can be conveniently installed.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a sectional view of an atomizer according to the prior art;

FIG. 2 is similar to FIG. 1 but showing the press head depressed, andfine drops of liquid ejected out of the press head;

FIG. 3 is an exploded view of a sealing cap according to the presentinvention; and

FIG. 4 is a sectional view showing the sealing cap installed in theatomizer.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to FIGS. 3 and 4, the sealing cap of the present invention isgenerally comprised of a sealing rubber 1, and a metal cap shell 2fitting over the sealing rubber 1. The sealing rubber 1 is shaped like acap comprising a flat annular base 10, a hollow cylindrical head 11raised from the inner side of the flat annular base 10, an annularcoupling portion 13 extending inwardly from the connecting area betweenthe flat annular base 10 and the hollow cylindrical head 11 on theinside, and a downwardly extending annular flange 12 at the top centerof the hollow cylindrical head 11. The metal cap shell 2 comprises aflat annular base 21 attached to the top side of the flat annular base10 of the sealing rubber 1 a cylindrical flange 20 extends downwardlyfrom the border of the flat annular base 21 and encloses around theperiphery of the flat annular base 10 of the sealing rubber 1. Acylindrical barrel 22 extends from the inner side of the flat annularbase 10 and enclosed around the hollow cylindrical head 11 of thesealing rubber 1. The barrel 22 has an inwardly extending annular topflange 24 defining a center through hole 23 and enclosing the topmostcircumferential edge of the hollow cylindrical head 11 of the sealingrubber 1.

Referring to FIG. 4 again, the hooked top end of the cylinder E ishooked on the annular coupling portion 13 of the sealing rubber 1 andsuspended inside the container H, the bottom plunger A of the press head1 is inserted through the downward annular flange 12 of the sealingrubber 1 and coupled to the piston F, which is movably disposed insidethe cylinder E and supported on a compression spring G above a dip tubeJ, which is connected to the cylinder E at the bottom for inducingliquid from the container H into the cylinder E. The outer diameter ofthe hollow cylindrical head 11 is slightly smaller than the innerdiameter of the barrel 22 of the metal cap shell 2. Therefore thedownward annular flange 12 is compressed against the periphery of thebottom plunger A to seal the gap when the hollow cylindrical head 11 ofthe sealing rubber 1 is fitted into the center through hole 23 of thebarrel 22 of the metal cap shell 2.

I claim:
 1. A sealing cap comprising a metal cap shell and a sealingrubber fitted into said metal cap shell for mounting around the bottomplunger of a press head of an atomizer, said metal cap shell comprisinga fiat annular base having an inner periphery and an outer periphery, acylindrical flange extending downwardly from the outer periphery of theflat annular base of said metal cap shell, a cylindrical barrelextending upwardly from the inner periphery of the flat annular base ofsaid metal cap shell and having an inwardly extending top annular flangedefining a top opening of the barrel, said sealing rubber comprising aflat annular base fitted within the downwardly extending cylindricalflange of said metal cap shell and attached to the interior side of theflat annular base of said metal cap shell, a hollow cylindrical headextending upwardly from the flat annular base of said sealing rubber anddefining a connecting area therewith the cylindrical head being fittedwithin the barrel of said metal cover shell, an annular coupling portionextending inwardly from the connecting area of the flat annular base andhollow cylindrical head of said sealing rubber, and a downwardlyextending annular flange at the center of the topmost edge of saidhollow cylindrical head for tightly engaging the periphery of the bottomplunger of the press head of the atomizer.